Refactored paths to use linked lists.

- Removed the code for the now-obsolete-before-actually-being-used pathLists.
- playerAreas now contain a list called pathList.
- Refactored createArea, createPath, and the /move and /look commands.
- Added typedefs to prevent the compiler being unable to link.

src/areadata.c

@@ -3,6 +3,7 @@
 #include <string.h>
 #include "areadata.h"
 #include "playerdata.h"
+#include "linkedlist.h"
 
 // ====================
 // -=[ Area/Paths: ]=-:
@@ -22,11 +23,8 @@ playerArea * createArea(char * nameString, char * descriptionString)
 	createdArea->areaName[31] = '\0';
 	createdArea->areaDescription[MAX - 36] = '\0';
 
-	// Ensure that all the paths are set to NULL:
-	for(int index = 0; index < 16; index++)
-	{
-		createdArea->areaExits[index] = NULL;
-	}
+	// Create a list for the paths in the area:
+	createdArea->pathList = createList(PATH);
 	
 	// Return the pointer:
 	return createdArea;
@@ -35,39 +33,24 @@ playerArea * createArea(char * nameString, char * descriptionString)
 // Create a path between two areas given two areas and two strings:
 int createPath(playerArea * fromArea, playerArea * toArea, char * fromDescription, char * toDescription)
 {
-	int fromAreaSlot, toAreaSlot;
-	for(fromAreaSlot = 0; fromAreaSlot < 16; fromAreaSlot++)
-	{
-		if(fromArea->areaExits[fromAreaSlot] == NULL)
-		{
-			break;
-		}
-		if((fromArea->areaExits[fromAreaSlot] != NULL) && (fromAreaSlot == 15))
-		{
-			return 1;
-		}
-	}
-	for(toAreaSlot = 0; toAreaSlot < 32; toAreaSlot++)
-	{
-		if(toArea->areaExits[toAreaSlot] == 0)
-		{
-			break;
-		}
-		if((toArea->areaExits[toAreaSlot] != 0) && (toAreaSlot == 31))
-		{
-			return 2;
-		}
-	}
+	// Allocate the new paths:
 	playerPath * fromPath = malloc(sizeof(playerPath));
 	playerPath * toPath = malloc(sizeof(playerPath));
-	fromArea->areaExits[fromAreaSlot] = fromPath;
-	toArea->areaExits[toAreaSlot] = toPath;
+
+	// Setup the from path:
 	strncpy(fromPath->pathName, fromDescription, 32 - 1);
 	fromPath->pathName[31] = '\0';
+	fromPath->areaToJoin = toArea;
+   
+	// Setup the to path:
 	strncpy(toPath->pathName, toDescription, 32 - 1);
 	toPath->pathName[31] = '\0';
-	fromArea->areaExits[fromAreaSlot]->areaToJoin = toArea;
-	toArea->areaExits[toAreaSlot]->areaToJoin = fromArea;
+	toPath->areaToJoin = fromArea;
+
+	// Add to the lists:
+	addToList(fromArea->pathList, fromPath, PATH);
+	addToList(toArea->pathList, toPath, PATH);
+	
 	return 0;
 }
 
@@ -85,16 +68,6 @@ areaNode * createAreaList(playerArea * initialArea)
 	return newAreaList;
 }
 
-// Create and initialize an pathList:
-pathNode * createPathList(playerPath * initialPath)
-{
-	pathNode * newPathList = malloc(sizeof(pathNode));
-	newPathList->data = initialPath;
-	newPathList->next = NULL;
-	newPathList->prev = NULL;
-	return newPathList;
-}
-
 // Adds an areaNode to the end of a list, returning it's position:
 int addAreaNodeToList(areaNode * toList, playerArea * areaToAdd)
 {
@@ -134,45 +107,6 @@ int deleteAreaNodeFromList(areaNode * fromList, playerArea * areaToDelete)
 	return 0;
 }
 
-// Adds an pathNode to the end of a list, returning it's position:
-int addPathNodeToList(pathNode * toList, playerPath * pathToAdd)
-{
-	pathNode * current;
-	int index = 0;
-	current = toList;
-	while(current->next != NULL)
-	{
- 		current = current->next;
-		index++;
-	}
-	current->next = malloc(sizeof(pathNode));
-	current->next->prev = current;
-	current->next->data = pathToAdd;
-	current->next->next = NULL;
-	return index;
-}
-
-// Removes an pathNode from the list, returning 0 on success and -1 on failure:
-int deletePathNodeFromList(pathNode * fromList, playerPath * pathToDelete)
-{
-	pathNode * current = fromList;
-	while(current->data != pathToDelete || current->next != NULL)
-	{
-		current = current->next;
-	}
-	if(current->next == NULL && current->data != pathToDelete)
-	{
-		return -1;
-	}
-	current->prev->next = current->next;
-	if(current->next != NULL)
-	{
-		current->next->prev = current->prev;
-	}
-	free(current);
-	return 0;
-}
-
 // Return the areaNode at the given index from the list:
 areaNode * getAreaNode(areaNode * fromList, int listIndex)
 {
@@ -191,24 +125,6 @@ areaNode * getAreaNode(areaNode * fromList, int listIndex)
 	return current;
 }
 
-// Return the pathNode at the given index from the list:
-pathNode * getPathNode(pathNode * fromList, int listIndex)
-{
-	pathNode * current = fromList;
-	for(int index = 0; index < listIndex; index++)
-	{
-		if(current->next != NULL)
-		{
-			current = current->next;
-		}
-		else
-		{
-			return NULL;
-		}
-	}
-	return current;
-}
-
 // Return the playerArea of the areaNode at the given index from the list:
 playerArea * getAreaFromList(areaNode * fromList, int listIndex)
 {

src/areadata.h

@@ -3,6 +3,8 @@
 #ifndef AREADATA_H
 #define AREADATA_H
 #include "constants.h"
+#include "linkedlist.h"
+
 // ====================
 // -=[ Area/Paths: ]=-:
 // ====================
@@ -18,9 +20,10 @@ struct playerPath
 
 struct playerArea
 {
+	list * pathList;
 	char areaName[32];
 	char areaDescription[MAX - 35];
-	playerPath * areaExits[16];
+//	playerPath * areaExits[16];
 };
 
 // Create an area given a name and description:

src/gamelogic.c

@@ -8,6 +8,7 @@
 #include "constants.h"
 #include "gamelogic.h"
 #include "playerdata.h"
+#include "linkedlist.h"
 #include "inputoutput.h"
 
 // =======================
@@ -364,16 +365,25 @@ int evaluateNextCommand(gameLogicParameters * parameters, commandQueue * queue)
 		strncat(lookMessage->messageContent, currentCommand->caller->currentArea->areaDescription, MAX - 35);
 		queueTargetedOutputMessage(parameters->outputQueue, lookMessage, &currentCommand->caller, 1);
 		bzero(lookMessage, sizeof(userMessage));
-		if(currentCommand->caller->currentArea->areaExits[0] != NULL)
+
+		// Loop through the paths and send the appropriate amount of messages:
+		int charCount = 13;
+		strncat(lookMessage->messageContent, "You can go:", 13);
+		
+		if(currentCommand->caller->currentArea->pathList->itemCount > 0)
 		{
-			strncat(lookMessage->messageContent, "You can go:", 13);
-			for(int index = 0; index < 16; index++)
+			for(size_t index = 0; index < currentCommand->caller->currentArea->pathList->itemCount; index++)
 			{
-				if(currentCommand->caller->currentArea->areaExits[index] != NULL)
+				if((charCount + 64) >= MAX)
 				{
-					snprintf(formattedString, 64, "\n\t%d. %s", index + 1, currentCommand->caller->currentArea->areaExits[index]->pathName);
-					strncat(lookMessage->messageContent, formattedString, 64);
+					queueTargetedOutputMessage(parameters->outputQueue, lookMessage, &currentCommand->caller, 1);
+					bzero(lookMessage, sizeof(userMessage));
+					charCount = 0;
 				}
+				snprintf(formattedString, 64, "\n\t%ld. %s", index + 1,
+						 getFromList(currentCommand->caller->currentArea->pathList, index)->path->pathName);
+				strncat(lookMessage->messageContent, formattedString, 64);
+				charCount += 64;
 			}	   
 			queueTargetedOutputMessage(parameters->outputQueue, lookMessage, &currentCommand->caller, 1);
 		}
@@ -469,7 +479,7 @@ int evaluateNextCommand(gameLogicParameters * parameters, commandQueue * queue)
 				strncat(statMessage->messageContent, formattedString, 120);
 				if((charCount + 43) >= MAX)
 				{
-					strncat(statMessage->messageContent, "\n", 2);
+//					strncat(statMessage->messageContent, "\n", 2);
 					queueTargetedOutputMessage(parameters->outputQueue, statMessage, &currentCommand->caller, 1);
 					bzero(statMessage, sizeof(userMessage));
 					charCount = 0;
@@ -800,13 +810,13 @@ outcome skillCheck(playerInfo * player, int chance, char * skillName, size_t ski
 int movePlayerToArea(playerInfo * player, char * requestedPath)
 {
 	// Check if a number was given first:
-	int selected = atoi(requestedPath);
-	if(selected != 0)
+	size_t selected = atoi(requestedPath);
+	if(selected != 0 && !(selected > player->currentArea->pathList->itemCount))
 	{
-		if(player->currentArea->areaExits[selected - 1] != NULL &&
-		   player->currentArea->areaExits[selected - 1]->areaToJoin != NULL)
+		if(getFromList(player->currentArea->pathList, selected - 1)->path != NULL &&
+		   getFromList(player->currentArea->pathList, selected - 1)->path->areaToJoin != NULL)
 		{
-			player->currentArea = player->currentArea->areaExits[selected - 1]->areaToJoin;
+			player->currentArea = getFromList(player->currentArea->pathList, selected - 1)->path->areaToJoin;
 			return 0;
 		}
 		else
@@ -816,16 +826,14 @@ int movePlayerToArea(playerInfo * player, char * requestedPath)
 	}
 
 	// Otherwise search for the description:
-	for (int index = 0; index < 16; index++)
+	for (size_t index = 0; index < player->currentArea->pathList->itemCount; index++)
 	{
-		if(player->currentArea->areaExits[index] != NULL)
+		if(strncmp(getFromList(player->currentArea->pathList, index)->path->pathName,
+				   requestedPath, 32) == 0)
 		{
-			if(strncmp(player->currentArea->areaExits[index]->pathName, requestedPath, 32) == 0)
-			{
-				printf("%s: %s\n", player->playerName, player->currentArea->areaExits[index]->pathName);
-				player->currentArea = player->currentArea->areaExits[index]->areaToJoin;
-				return 0;
-			}
+			printf("%s: %s\n", player->playerName, getFromList(player->currentArea->pathList, index)->path->pathName);
+			player->currentArea = getFromList(player->currentArea->pathList, index)->path->areaToJoin;
+			return 0;
 		}
 	}   
 	return 1;

src/linkedlist.c

@@ -90,7 +90,7 @@ listData * getFromList(list * list, size_t listIndex)
 	// Return the head if index is 0:
 	else if(listIndex == 0)
 	{
-		return &list->head->data;
+		return &(list->head->data);
 	}
 	// Loop through the entries in the list until we get to the right one:
 	else
@@ -100,7 +100,7 @@ listData * getFromList(list * list, size_t listIndex)
 		{
 			currentNode = currentNode->next;
 		}
-		return &currentNode->data;
+		return &(currentNode->data);
 	}
 }
 
@@ -424,7 +424,7 @@ bool getIndexFromList(list * list, void * data, listDataType type, size_t * inde
 		return false;
 	}
 
-	for(*index = 0; *index < list->itemCount; *index++)
+	for(*index = 0; *index < list->itemCount; *index += 1)
 	{
 		switch(type)
 		{

src/linkedlist.h

@@ -2,8 +2,14 @@
 // Barry Kane, 2022.
 #ifndef LINKEDLIST_H
 #define LINKEDLIST_H
-#include "playerdata.h"
 #include "areadata.h"
+#include "playerdata.h"
+
+// Let the compiler know there will be structs defined elsewhere:
+typedef struct playerPath playerPath;
+typedef struct playerArea playerArea;
+typedef struct playerInfo playerInfo;
+typedef struct playerSkill playerSkill;
 
 // ========================
 // -=[ Data Structures ]=-:

src/playerdata.h

@@ -6,6 +6,11 @@
 #include <stdbool.h>
 #include "areadata.h"
 #include "constants.h"
+#include "linkedlist.h"
+
+// Let the compiler know there will be structs defined elsewhere:
+typedef struct playerPath playerPath;
+typedef struct playerArea playerArea;
 
 typedef struct statBlock
 {
@@ -49,7 +54,7 @@ typedef struct skillList
 	skillNode * head;
 	int skillCount;
 } skillList;
-\
+
 typedef struct playerInfo
 {
 	char playerName[32];